I mean, to automatically unmount the disk image application.
When you use for example messenger, it mount the disk image on desktop, right? But when i quit the program, the image still mounted in the desktop. I want to know if is there a way to unmount the disk image automatically when i quit the program?
Why don't you simply drag the application from the mounted disc image to your Applications folder? Then you can either save the disc image file you downloaded or delete it altogether. The application can now be launched from your Applications folder, so there is no need to mount or unmount a disc image.
hum.. is not this. I have everything installed.
Some application when you use it, they mount the disk image, so after you finish you need to eject. My question, is there any setting that allow me eject the disk image when I quit the application?
The point those folks are trying to make is you should mount the disc image, drag the application to the Applications folder, then unmount & delete the disc image. You should now be able to open the application from the Applications folder.